Burying concerns over the identity of her biological father, Nina focuses on the hunt for a rental property with Patrick. Nina's only forced to confront the issue when Billie reveals she located one of the possibilities. Billie's disappointed to discover her only fertile time of the month coincides with Tim and Andrew's first big date. Striking a compromise, Billie suggests Andrew keep things on third base with Tim and save himself to donate the following afternoon. Jimmy and Zara attend the first ultrasound for their baby.